Hi, I am trying to install XP on my iMac (Tiger) and I reach receive a message "Please insert one of the following product CDs. What follows is a list of prior MS operating systems. If I don't have one I cannot proceed. Well, I threw out my old Windows 98 discs a few years after I had installed XP. Never thought I would need them again. Seems like Bill has out smarted me again! Do I really need to go and buy a new full version of XP again to get past this screen?